RDMA: During rereg_mr ensure that REREG_ACCESS is compatible

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Summary

CVECVE-2026-52908
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-19 15:16:35 UTC
Updated2026-06-19 15:16:35 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: RDMA: During rereg_mr ensure that REREG_ACCESS is compatible If IB_MR_REREG_ACCESS changes from RO to RW then the umem has to be re-evaluated to ensure it is properly pinned as RW. Since the umem is hidden inside each driver's mr struct add a ib_umem_check_rereg() function that each driver has to call before processing IB_MR_REREG_ACCESS. mlx4 has to retain its duplicate ib_access_writable check because it implements IB_MR_REREG_ACCESS | IB_MR_REREG_TRANS by changing both items in place sequentially while the MR is live, so it will continue to not support this combination.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected b40656aa7d559adc1fe689396dc58b92a9a27286 09dc18894148381d3bfc550083b1236043870dce git Not specified
CNA Linux Linux affected b40656aa7d559adc1fe689396dc58b92a9a27286 eba5df21eda0fe7418efbea2f799f8ea1b8ca94c git Not specified
CNA Linux Linux affected b40656aa7d559adc1fe689396dc58b92a9a27286 2904e985a2917b5dac65df82733065e78a65fc9d git Not specified
CNA Linux Linux affected b40656aa7d559adc1fe689396dc58b92a9a27286 50334a05a950840b39a1ce3d2a173b4183db9b3e git Not specified
CNA Linux Linux affected b40656aa7d559adc1fe689396dc58b92a9a27286 badad6fad60def1b9805559dd81dbab3d97b82aa git Not specified
CNA Linux Linux affected 6.2 Not specified
CNA Linux Linux unaffected 6.2 semver Not specified
CNA Linux Linux unaffected 6.6.143 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.94 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.36 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.13 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/50334a05a950840b39a1ce3d2a173b4183db9b3e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/09dc18894148381d3bfc550083b1236043870dce 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2904e985a2917b5dac65df82733065e78a65fc9d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/eba5df21eda0fe7418efbea2f799f8ea1b8ca94c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/badad6fad60def1b9805559dd81dbab3d97b82aa 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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